The last link lists what is needed to develop a zimlet but it does not have any information other than the required programs.

I understand the zimbra portion of what I need, what I need help with is the JavaScript portion.

I am going to write a zimlet that will allow a user to drop a calendar onto it then pass the data to the JavaScript. The JavaScript will parse out the body of the appointment then make a SOAP connection to our server and add the information in.